正交试验设计采用正交表安排实验,在正交试验中,各因素水平的安排因其正交表的搭配均衡性而具有均衡分散性和整齐可比性的特征,因而正交试验属于最优试验设计,通过正交实验确定的最佳条件,即使不是全面实验中的最佳条件,也往往是相当好的条件.按着正交试验得到的最佳方案的试验条件在温度定为600℃加热3 h,加入5 mL硝酸,3 mL高氯酸,140℃恒温箱放置4 h.%By orthogonal experimental design of orthogonal experiment in the orthogonal test,the level of each factor arrangement because of its orthogonal collocation with equilibrium equilibrium of dispersion and neat comparable features,which belongs to the optimal design of orthogonal test,the optimal conditions were determined by orthogonal experiment,if not the best in comprehensive experiment the condition,also tend to be fairly good condition. According to the test conditions the best solution obtained from orthogonal experiment in the temperature is 600℃heating for 3 hours,add 5mL of nitric acid,perchloric acid 3mL, 140 ℃ thermostat placed for 4 hours.
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